Rock-drill.



D. S. WAUGH.

ROCK DRILL.

APPLICATION FILED APR. l1, 1912.

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ROCK DRILL.

1,178,892. APPLICATION FILED APR. |71. 19l2. 11, "ll/fsm 3 SHEETS-SHEET 2.

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D. S. WAUGH.

ROCK DRILL.

APPLICATION FILED APII. II, |912.

WITNESSES NmD STATES PATENT OFFICE.

DANIEL S. WAUGH, OF DENVER, COLORADO, ASSIGNOR, BY MESNE ASSIGNMENTS, T0 THE DENVER ROCK DRILL MANUFACTURING COMPANY, 0F DENVER. COLORADO, A

CORPORATION OF DELAWARE.

^ ROCK-DRILL.

Application filed April 17, 1912.

To all whom t may concern.'

Be it known that 1. DANIEL S. VAUGH. a citizen of the United States. residing at Denver, in the county of Denver and State of Colorado. have invented new and useful Improvements in Rock-Drills. of which the following is a specification.

The present invention relates to rock drills, and more particularly to the means for introducing a cleansing fluid into the drill hole. to remove the cuttings therefroln.

The primary object is to provide a simple and effective structure for this purpose that will be economical in use. at the same timeA having a high degree of efliciency, and furthermore it is so constructed that the parts thereof. are not liable to be excessively worn, injured. orkcut in use.

The preferred embodiment of the invention is illustrated in the accompanying drawings. wherein Figure 1 is a side elevation, partly in section of a hammer drill, embodying the invention. Fig. 2 is a section on an enlarged scale of a portion of the same. Fig. 3 is a section still furtherenlarged of the valve mechanism, and illustrating more clearly the passages b v which the cleansing fluid is conducted to the internal tube. Fig. 4 is a sectional view on the line 4 4 of Fig. 2. Fig. 5 is a detail sectional view on the line 5 5 of' Fig. 4. Figs. (l. 7 and 8 are respectively, sections taken on the lines 6 6. 7 7, and 8 8 of Fig. 2. Fig. 9 is a sectional view taken on the line 9 9 of Fig. 1. Figs. 10 and 11 are respectively. detail sectional views taken on the lines 10 1O and 11 11 of Fig. 1. Fig. 12 is a sectional view taken on the line 12 12 of Fig. 3. Fig. 13 is a longitudinal sectional view taken on the line 12 12 of Fig. 3 showing a detail of the coupling member.

Similar reference numerals designate corresponding parts in all the figures. of the. drawings.

1n the embodiment illustrated. the drill comprises a cylinder member 13. having at one end a chuck 14. and at its other end. a head block 15. 'ithin the cylinder member operates the usual reciprmratory piston 1G, which strikes against a tappet 17 interposed between said piston and the inner end of the usual removable drill bit or steel 18. A@eem-ed to the head block 15. is the cylinder 19 of the usual fluid-operated feeding Specification of Letters Patent.

Patented Apr. 11, 1916.

Serial No. 691,371.

means, a piston 20, operating in said cylinder and having a piston rod or stem 21 that projects from its rear end and is pointed to produce a spur 22. In the present embodiment, the cylinder 19 is secured in place on the head block by a split clamping band 23. the ends of which are drawn together by a bolt 24, and the parts being held against relative movement by a plug 25 threaded Into the band 23 and extending transversely through the end of the cylinder 19 and the portion of the head block surrounded by said cylinder, as illustrated in Fig. 2.

Intel-posed between the head block and the rear end of the cylinder 13, is a' support in the form of a closure plate 26, having a central opening 27 therethrough, communieating with a socket 28. A cleansing fluidconducting tube 29 extends axially through the cylinder member 13, and into the opening 27 of this closure plate. The rear end of this tube is flanged, as illustrated at 30, the said flange being located in the 'socket 28. and a plug 31, threaded into the socket, bears against the flange to maintain the tube in place. This tube, it will be observed, extends through a bore 32 in the piston, and its front end is located in the tappet 17, said tappet being provided with a bore 33 snugly receiving said end. 'The tappet in advance of the tube 29, has a reduced passageway 35 that is in alinement and communicates with the rear end of a passageway 36 formed longitudinally in the drill bit or steel 18.

lwotive fluid is supplied to the machine through a tube 37, connected by a coupling 38 that is threaded into one side of the head block 15, said coupling having an internal chamber 39. An initial or controlling valve 40 is rotatably mounted in the head block, in line with the, said coupling 38, being provided with a handle 41 projecting from the side of the head block opposite to the said coupling 38. The valve has its end recessed, as illustrated at 42, and leading therefrom, is a supply port 43 movable into and out of communication with a port 44 formed in the head block, said port 44 opening into a chamber 45 formed between the closure plate 26 and the head block. From the chamber 45, a passage 46 leads to the valve casing 47, in lwhich is located an automatic valve 48 that controls the supply of motive fluid to the cylinder member, on opposite sides of the piston 16. for the purpose of reciprocating said piston. Inasmuch as the particular structure of this valve constitutes no part of the present invention. it is believed to be needless to describe the same. and it will be evident that valves of various characters may be employed. It may be noted. however. that the valve casing constitutes the means for connecting the handle 19 to the cylinder-member 13, for the purpose of rotating or oscillating the drill.

A socket 50 is formed in the end of the coupling 3S, and a reduced port 51 leads from the chamber 39 into this socket. EX- tending from one side of the said socket 50. and illustrated more particularl)7 in Fig. 12, is a passage 52 leading to an annular channel 53 formed between the coupling 38 and the head block (see Fig. 3). and from this channel extends an angular passage 54 that opens into an annular chamber 55 surrounding the flange 3() of the tube 29. and the inner end of the plug 31. Ports 5G in said plug lead from the chamber to the hollow interior 57 of the plug. and thus afford communication with the bore of the tube 29.

The passage of the gaseous motive fluid from the chamber 39 to the tube 29, by way of the above described conduit, is controlled b v a plug valve 5S that moves into and out of the port 51 to close the same. This plug valve is provided with a stem 59. having a screw threaded engagelnent with a cuff 60 that is pinned. as shown at (31. to a rotatable actuating handle (32 rotatably mounted on the projecting end of the coupling 3S. and held in different positions by a springpressed plunger G3. The cuff GO is -iournaled in a sleeve 6l that is threaded into the socket 5() of the coupling. and this sleeve is provided with diametrically opposite slots G5,

in which are engaged the ends of a cross pin (3(3 carried bv the stem 59 of the plug. valve 5S. \\'ith this arrangement. it will be evident that if the head or handle G2 is rotated, the cuff (30 will be correspondingly turned. and inasmuch as the valve 5S cannot turn with it. the threads will carry the said valve into or out. of the port 51. thus closing or opening said port. and permitting the gaseousfluid. under pressure. to flow from the chamber 39, through the port 51. thel socket 50, the passageway 52, channel 53. passageway 5l. chamber 55, and ports 56 into the interior 57 of the plug, and from thence into and through the tube 29. Passing from the front end of this tube 59. the said fiuid will enter the port 35 in the tappet` and consequently be delivered into the passageway 3G of the drill bit.

Means is also provided for introducing a cleansing liquid into the drill hole. and this liquid is supplied from any suitable source, through a' tube 67. having a controlling valve 68 therein. The tube 67 has an elbow connection G9 with the coupling 3S, and the passageway therethrough communicates with the passageway 52. so that. by turning the valve (38 to open position. the liquid will enter the passageway 52. and pass, by the above describedl course. to the drill bit.

The initial-valve 40. as shown more particularly in Fig. l. is provided with a trans-- verse port 70 that moves into and out of communication with a passage 71 leading to the air feed cylinder 19. and when the said valve is turned toward its open position. the port 7U is first brought .into communication with the passage 71. to cause the Huid, under pressure. to enter the cylinder and move the machine to its work. Upon a further movement of the valve. the port -13 is brought into connnuuication with the port JA. and the motor is thus thrown into operation. as alreadyY described. When this movement takes place. as illustrated in Fig. 4, the port 70 moves out of communication with the port 71. and another port 72 is brought into communication with a passagewav 73. leading to the front end of the cylinder member. where it comn'iunicates with a transverse port 74 normally closed by the tappet 17. 'Diametrically opposite the port 7l is another transverse port 75, communicating with a passageway 76 that leads rearwardly and is brought into communication with the passage 71. by means of a channel 77 formed in one side of the initial valve 40. The operation of this arrangement is Such that when the tappet 17 is moved forwardly sutlicientlv. the ports 74 and 75 will be brought into communication, and the pressure in the feed cylinder 19 will be varied. This feature in itself constitutes the subject-matter of Patent. No. 969,319, granted September G. 1910. and needs no further illustration. Attention is called, however, to the fact that leading from the passageway 73. is a port slot 7S communicating with a passageway 79 that leads to an annular channel S0. formed in the chuck. From this channel S0. rearwardlv and inwardly inclined ports 81. shown more particularly in Fig'. 2. lead to another internal channel S2. surrounding the .socket for the drill bit. the inner open sidel of this channel 82 being normally closed. or substantially closed by the bit when in place.

Briefly described. the operationV of the apparatus is as follows: Upon turning the initial or throttle valve 40 from its closed position, the first action is to deliver the fluid. under pressure, to the l,feed cylinder. which will cause the motor and drill to be carried to its work. further movement of the valve supplies the motor with actuating fluid. causing the hammer piston 1G to deliver its blows to the tappet i7. and said tappet transmits the force of these blows to the drill steel introduced into the chuck.

TVhen it is desired to moisten the cuttings in the drill hole, it is only necessary to open the valve G8. whereupon the liquid will flow into the tube' 29, and passing through the. tappet, will enter the drill bit. If it is desired to blow out the cuttings by the air or gaseous fluid under pressure, the plug valve 58 is opened,` whereupon the said gaseous fluid will pass through the drill bit to the bottom of the drill hole. If desired, both liquid and gaseous fluids may be delivered by opening or partially opening both valves simultaneously. It will of course be understood that there will be some leakage of the liquid between the drill bit and the end of the tappet, but by providing the channel 82 around the drill bit, and supplying this channel with fluid under pressure, a substantial seal is provided that will prevent to a very great extent, leakage around the drill steel, and furthermore this fluid has a tendency to move inwardly. In fact, part of such fluid will thus escape, so that it will find its way into the passage ofthe drill bit. It is also to be noted that the tappet in this structure performs three distinct functions. It operates to transmit the blow of the piston to the drill bit. It prevents leakage of the actuating fluid from the piston to the drill bit, and it constitutes part of the means for delivering cleansing fluid to the drill bit. Furthermore by inclosing the end of the cleansing fluid conductingv tube, it protects the same against being battered, cut or otherwise injured.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art, without further description, and it will be understood that various changes in the size, shape, proportion, and minor details of construction. may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a drilling machine, the combination with a fluid actuated motor and a drill bit associated therewith, the latter having a passageway therein, of means for delivering cleansing fluid through the motor to the drill bit, means for preventing the passage of the actuating fluid from the motor to the drill bit, and means other than the first delivering means having communication with the drill bit for supplying other cleansing fluid to the same in advance of said preventing means.

2. In a drilling machine, the combination with a fluid actuated motor including a cylinder member and a reciprocatory piston operating therein, of a drill bit associated with the motor and having a passageway therein, means for delivering one kind of cleansing fluid through the piston to the drill bit, means other than the first delivering means for delivering another kind of cleansing fluid to the drill bit. and means for preventing the passageA of the actuating fluid from the motor to the drill bit.

3. In a drilling machine, the combination with a fluid actuated motor including a piston and a drill bit associated therewith. the latter having a passageway therein, of cleansing fluid supply means associated with the motor and extending through the piston, and means for preventing the passage of the actuating fluid from the motor to the drill bit, said latter means also constituting means for directing the cleansing fluid from the supply means to the drill bit.

4. In a drilling machine, the combination with a fluid actuated motor including a cylinder member and a reciprocatory piston operating therein, of a tube for cleansing fluid extending through the piston, and a tappet interposed between the piston and drill bit for transmitting the flow of the former to the latter and having a front abutment shoulder for the rear end of the drill bit, said tappet constituting means for preventing the passage of the actuating fluid from the motor to the drill bit, and having a port that constitutes means for directing the cleansing fluid from the front end of the tube to the rear end of the drill bit.

In a drilling machine. the combination with a fluid actuated motor including a piston. of a drill bit having a passageway, a tappet interposed between the piston and drill bit and having a front abutment face for the rear end of the bit. and a cleansing fluid conducting tube extending into the tappet and terminating therein short of the abutment face, said tappet having a bore that affords communication between the front end of the tube and the rear end of the bit, for conveying cleansing fluid from the tube to the bit.

6. In a drilling machine, the combination with a fluid actuated motor including a reciprocatory piston having an axial bore, of a drill bit in line with the piston and having an axial passageway, a tappet interposed between the piston and drill bit and being also provided with an axial bore. and a cleansing fluid conducting tube extending longitudinally through the piston and snugly fitting in the bore of the tappet. the front end of said tube terminating in the tappet bore short of the front end thereof, said bore 'thereby constituting means for conducting fluid from the tube to the drill bit.

7. In a drilling machine. the combination with a motor having a chuck. of a drill bil removably fitted in the chuck, means for delivering cleansing liquid through the inner end of the drill bit, and means for producing a gaseous fluid seal in the chuck around the bit.

8. In a drilling machine, the combination with a motor having a chuck, of a drill bitl removably fitted in the chuck, means for delivering cleansing liquid into the bit, said chuck having a fluid channel surrounding the drill bit, and means for delivering gaseous fluid under pressure into the channel.

9. In a drilling machine, the combination with a motor including a piston, of a drill bit having a passage therethrough, means for delivering cleansing liquid through the piston to the drill bit, and means for producing a fluid seal around the drill bit to prevent leakage of the cleansing liquid past the same.

10. In a drilling machine, the combination with a motor, including a cylinder member, of a reciprocatory piston operating therein, a chuck carried by the cylinder member and having a drill bit receiving socket and a fluid channel surrounding and communicating with the socket, means for delivering cleansing fluid to the inner end of the drill bit, and means for introducing gaseous fluid under pressure to the channel. to provide a seal about the drill bit.

11. In a drilling machine, the combination with a fluid actuated motor, including a cylinder member, of a reciprocatory piston operating therein, a chuck secured to the cylinder member and having an internal fluid channel, a drill bit detachably located in the chuck and having a passageway therethrough, a. tappet interposed between they drill bit and piston, a cleansing fluid conducting tube extending through the piston and terminating in the tappet, means for introducing a cleansing fluid into said tube, and means for introducing a gaseous' fluid under pressure to the internal channel of the chuck.

12. In a drilling machine', the combination with a cylinder member` of a piston operating therein, a closure plate for the cylinder member having a rearwardly opening socket, a tube extending through the piston member and having a flanged end located in the socket of the closure plate, a plug threaded into the socket and bearing against the flange, and means for introducing fluid into the tube and including lateral ports opening through said plug.

13. In a drilling machine, the combination with a cylinder member, of a head block secured to the rear end thereof, a closure interposed between the head block and cylinder member and held in place thereby, said closure having a central socket, a reciprocatory piston operating in the cylinder member. a tappet engaged by the piston, a tube having a flanged end in the socket of the closure and having its other end in the tappet, means for securing the said end in the socket, and means for introducing motive fluid into the tube.

14. In a drilling machine, the combination with a cylinder member, of a head block secured to the rear end thereof, a tube projecting into the cylinder member, means for connecting a fluid supply to the head block, including a coupling projecting from one side of said block, a passage extending from the coupling to the tube, and a controlling valve for the passage mounted on the free end of the coupling and disposed longitudinally thereof.

15. In a drilling machine, the combination with a cylinder member, of a head block secured to the rear end thereof, a tube pro jecting into the cylinder member, means for connecting a gaseous fluid supply to the head block, including a coupling projecting from one side of said head block, a passage extending from the coupling to the tube, a fluid supply communicating with the passage, and a valve in the passage controlling the supply of gaseous fluid to the tube.

16. In a drilling machine, the combination with a cylinder member, of a head block secured to the rear end thereof, a closure plate interposed between the head block and cylinder member, a tube mounted on the closure plate and rojecting axially through the cylinder mem er, means for separately supplying a liquid and a gaseous cleansing fluid to the tube, including a coupling rojecting from one side of the head blocli, a valve mounted on the end of the coupling for controlling the passage of one of the fluids to the tube, a reciprocatory piston operating in the cylinder member and having an axial bore that receives the tube, a chuck carried by the end of the cylinder member and having an internal channel surrounding the bit socket, a bit detachably located in the socket and having a passage therethrough, a tappet interposed between the drill bit and piston and having a bore that Ycommunicates with the passage of the bit and snugly re ceives the end of the tube, and means for introducing a gaseous fluid into the channel of the chuck and around the drill bit.

17. In a drilling machine, the combination with a fluid-actuated motor, including a cylinder member and a piston operating therein, of a drill bit actuated by the piston and associated With the motor, said bit having a passageway therethrough, means for delivering a cleansing fluid through the piston tothe drill bit, and means for preventing the escape of said cleansing fluid around the drill bit, said latter means also supplying a cleansing fluid to the drill bit.

18. In a drilling machine, the combination with a fluid-actuated motor, including a cylinder member and a piston operating iso' therein, of a drill bit actuated by the piston and associated with the motor, said drill bit having a passageway therethrough, means for delivering a cleansing liquid through the piston to the drill bit, and means for preventing the escape of said cleansing liquid around the drill bit, said means also supplying a gaseous cleansing fluid to the drill bit.

19. In a drilling machine, the combination with a fluid-actuating motor,- including a cylinder member and a piston operating therein, of a drillbit actuated by the piston and associated with the motor and having a passageway therethrough, a tube extending through the piston and delivering a cleansing llquid to the drill bit, means interposed between the drill bit and piston for producing a fluid-tight joint therebetween, and means for forming a gaseous seal around the inner end of the drill bit, said means having communication with the inner end of the drill bit, to permit the passage of fluid rom said seal to the passageway in the drill In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

DANIEL S. WAUGH.

Witnesses:

W. H, LEONARD, J As. R. ELMENDORF. 

